Sliding-door sheave



L. SUTKER SLIDING DOOR SHEAVE Filed July 8 1925 gnvwntoz Sui/a6):

atgozucq Patented July 20, 1926.

LOUIS SUTKEB, OF BROOKLYN, NEW YORK.

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. Application and July 3, 1925. Serial No. 42,189.

a. The present invention is a sheave of the type for hanging or mounting sliding doors of show cases and the like, and relates particularly to improvements in the construction of the sheave.

Sheavesof this character generally con sist of a housing or casing containing a roller 01 ball bearing which engages with a track to permit of easy operationof the door and the casings are generally composed of two complementary sections suitably held in position together. It has been found in practice that these sections of the casing very often become disconnected and move relative to each other, causing the roller or ball bearings therein to become dislocated and upset from proper position, binding against the casingand each other, resulting in the door losing its smooth and easy operation on the track,

It is the object of the present invention to overcome this drawback and to provide a casing or retainer for roller and ball bearings, composed of sections which are interlocked in such a manner as will prevent the sections from moving relative to each other in the event the fastening means become broken or disconnected.

It is also an object of the invention to' provide means which will interlock and temporarily hold the sections of the casing together after the rollers or balls have been assembled therein and during the fastening operations for securing the sections together. It is also an object of the invention to provide a sheave of the abovestated characfor which is more economical to manufacture and which is simple in its construction;

Further objects and features of the invention reside in the sundry details of construction, combination and arrangement of parts, which will appear as the specification proceeds and be specifically pointed out in the appended claims.

In this specification and the annexed drawings, the invention is disclosed in the form in which it is considered to be the best, but the invention is not limited to such form, because it is capable of being embodied in other forms; and it is to be understood that by and in the claims following the description herein it is intended to cover the invention in whatever form it may embodywithin the scope thereof.

Referring particularly to the drawings which illustrate the invention in its preferred embodiment as at present devised: Figure 1 is a side elevation, partly broken away, of a ortion of a showcase or similar member, s owing one of i the improved sheaves or casters in position therein, and engaging a rail upon which thesame is adapted to roll.

Fig. 2 is a transverse vertical section of the caster taken substantially on line 2-2 of Fig. 1,

Fig. 3 is a transverse horizontal section of the caster or sheave taken substantially on line 3 3 of Fig. 1,

Fig. 4 is a view similar to Fig. 8, but showing a slightly modified form of the invention, r V

7 Fig. 5 is a side elevation of another modilied form of the invention, and

Fig. 6 is a transverse sectional view of the sheave taken on line 6-6 of Fig. 5.

Referring in detail to the drawings, 1

PATENT OFFICE.

denotes the casing consisting of two similar I members, each being provided with an endless angular raised rib, which when the members or sections are assembled together as illustrated in the drawing, form an interior groove, way or track 2, the lower portion of which lies in a practically horizontal position to provide a relatively long bearing surface to engage the track, when the balls are within the groove or way 2,

and" the part of said groove or way extending upwardly isformed in a curved direction or semi-elliptical, The intermediate portion of the sections A and B forms a web surrounded by said groove or way. The construction above set forth has only two corners for the rollers or balls 3, to turn in their passage around the way 2, while at the same time one side of the sheave is substantially straight to present a number of balls to the rail or track 4, over which the sheave moves.

The sections A and B are also provided with a pair of depending substantially vertical flanges 5 on the lower edge of the way 2, which extend below the rail 4, to maintain the sheave in contact therewith while being moved thereover.

At the ends of the substantially straight portion of. the way 2, each section A and B is formed with an outstanding prong 6, the adjacent prongs of the sections at each end of the casing are spaced apart and are adapted to be driven into the wood of the showcase or door frame, as the case may be, to hold the casing within a suitable recess or mortise 7, formed in the latter for the reception of the casing, as clearly illustrated in Figs. 1 and 2 of the drawing. 7

In practice, the sections A and B had been held together by bolts, screws and rivets, extending through the intermediate or web portions 8, which portions oppose or contact with each other in the assembled device. The rough and hard treatment and usage which thesesheaves are subjected to result in the bolts, screws and rivets becoming disconnected or sheared off. As stated in the forepart of this specification, this is very objectionable and a considerable drawback. To overcome this disadvantage, the present device is provided with integral interlocking portions consisting of corresponding projections and recesses stamped, pressed or otherwise formed in the web portions 8 of the sections A and B. The projections on the inner face of the web portion of one section are positioned to engage in the depressions or openings formed in the web portion of the other section, thereby to maintain the sections in position against edgewise relative movement in all directions so that the sections will not shift relative to each other, even though the other fastening means becomes disconnected. It is preferred, as' shown in Figs. 1 to inclusive, to provide at least two sets of corresponding projections and depressions to interlock the sections together, and where more than one set is provided, it is preferred to have each set extending in opposite direc tions as clearly shown in Fig. 3. For instance, a projection 10 of the section A will extend into the depression 11 of the section B, and the projection 12 of section B will extend into the depression 13 of the section A.

These projections and depressions are formed integral with the casing and are of such corresponding length and depth as to effectively interlock. Moreover, by providing two sets of interlocking means, the sections A and B are also positively held against relative rotative movement.

These interlocking means are also of considerable advantage in assembling the de vice by maintaining the sections against accidental movement while being welded or riveted together and after the balls or rollers have been laid in the way 2, thus keeping the sections in uniform alinement and preventing the slipping of the same out of posi tion, enabling easy handling by the operator. The sections A and B are permanently fastened together, preferably by welding, at the points of depression 10 and 12. The cups or pockets formed by these depressions act to arrest the spark of the welding, preventing the flame from spreading unduly and injuring the balls or rollers and confining them to the cup or pocket portions. Even should the bond between the sections A "and B caused by the welding become broken, the interlocking projections and recesses will maintain the sections against endwise and rotative movements in the mortise 7 In the embodiment shown in Fig. 4c, instead of welding the sections of the casing together at the interlocking means, the same are riveted together at these points, as clearly illustrated.

In Figs. 5 and -6, another type of sheave is illustrated employing the interlocking principle employed in the other forms, but in the present instance only one set of projections and depressions are shown. In this type of sheave, the interlocking means will prevent endwise? movement while the tongue and recess 14. and 15 will prevent rotative movement of the sections of the casing.

What I claim is:

1. In a device of the character described, a casing composed of two complemental sections, said casing having means for retaining roller bearing members, rollers in said means, and interengaging means on said sections at points surrounded by said retaining means to lock said sections against edgewise movement in all directions.

2. A device of the character described, comprising a casing composed of comple mental sections, a continuous race formed by the sections within said casing roller bearings in said race, and interengaging members provided on the portions of said sections encircled by said race to interlock, when the sections are assembled together, for preventing edgewise movement of the sections relative to each other in all directions.

3. A device of the character described, comprising a casing composed of complemental sections. a continuous race formed by the sections roller hearings in said race, the portions of' said sections encircled by said race extending inwardly to abutting relation, interengaging projections and recesses provided on and in said inwardly extending portion of said sections to interlock when the sections are assembled together for preventing edgewise movement of the sections relative to each other in all directions, and means securing said sections together at the point of engagement of said projections and recesses.

4. A device of the character described, comprising a casing composed of complemental sections each channeled on its inner face to provide an endless runway when the sections are brought together, roller in said runway, interlocking means for preventing relative endwise shifting movement of the sections, said means including a plurality of corresponding depressions formed in the intermediate portion of each sectioninterengaging one with the other by theprojection ormed by one depression engaging in the 1 recess formed by another depression in 'the other section, the depressions on each section extending in opposite directions.

In testimony whereof I have hereunto set my hand. i

LOUIS SUTKER. 

